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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2023 Apryse Group NV
Authors: Apryse Software.
This program is offered under a commercial and under the AGPL license.
For commercial licensing, contact us at https://itextpdf.com/sales. For AGPL licensing, see below.
AGPL licensing:
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see .
*/
package com.itextpdf.signatures;
import com.itextpdf.bouncycastleconnector.BouncyCastleFactoryCreator;
import com.itextpdf.commons.bouncycastle.IBouncyCastleFactory;
import com.itextpdf.signatures.logs.SignLogMessageConstant;
import java.util.HashMap;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Class that contains OID mappings to extract a signature algorithm name
* from a signature mechanism OID, and conversely, to retrieve the appropriate
* signature mechanism OID given a signature algorithm and a digest function.
*/
public class SignatureMechanisms {
private static final Logger LOGGER = LoggerFactory.getLogger(SignatureMechanisms.class);
private static final IBouncyCastleFactory BOUNCY_CASTLE_FACTORY = BouncyCastleFactoryCreator.getFactory();
/** Maps IDs of signature algorithms with its human-readable name. */
static final Map algorithmNames = new HashMap<>();
static final Map rsaOidsByDigest = new HashMap<>();
static final Map dsaOidsByDigest = new HashMap<>();
static final Map ecdsaOidsByDigest = new HashMap<>();
static {
algorithmNames.put("1.2.840.113549.1.1.1", "RSA");
algorithmNames.put("1.2.840.10040.4.1", "DSA");
algorithmNames.put("1.2.840.113549.1.1.2", "RSA");
algorithmNames.put("1.2.840.113549.1.1.4", "RSA");
algorithmNames.put("1.2.840.113549.1.1.5", "RSA");
algorithmNames.put("1.2.840.113549.1.1.11", "RSA");
algorithmNames.put("1.2.840.113549.1.1.12", "RSA");
algorithmNames.put("1.2.840.113549.1.1.13", "RSA");
algorithmNames.put("1.2.840.113549.1.1.14", "RSA");
algorithmNames.put("1.2.840.10040.4.3", "DSA");
algorithmNames.put("2.16.840.1.101.3.4.3.1", "DSA");
algorithmNames.put("2.16.840.1.101.3.4.3.2", "DSA");
algorithmNames.put("1.3.14.3.2.29", "RSA");
algorithmNames.put("1.3.36.3.3.1.2", "RSA");
algorithmNames.put("1.3.36.3.3.1.3", "RSA");
algorithmNames.put("1.3.36.3.3.1.4", "RSA");
algorithmNames.put("1.2.643.2.2.19", "ECGOST3410");
// Elliptic curve public key cryptography
algorithmNames.put("1.2.840.10045.2.1", "ECDSA");
// Elliptic curve Digital Signature Algorithm (DSA) coupled with the Secure Hashing Algorithm (SHA) algorithm
algorithmNames.put("1.2.840.10045.4.1", "ECDSA");
// Elliptic curve Digital Signature Algorithm (DSA)
algorithmNames.put("1.2.840.10045.4.3", "ECDSA");
// Elliptic curve Digital Signature Algorithm (DSA) coupled with the Secure Hashing Algorithm (SHA256) algorithm
algorithmNames.put("1.2.840.10045.4.3.2", "ECDSA");
// Elliptic curve Digital Signature Algorithm (DSA) coupled with the Secure Hashing Algorithm (SHA384) algorithm
algorithmNames.put("1.2.840.10045.4.3.3", "ECDSA");
// Elliptic curve Digital Signature Algorithm (DSA) coupled with the Secure Hashing Algorithm (SHA512) algorithm
algorithmNames.put("1.2.840.10045.4.3.4", "ECDSA");
// Signing algorithms with SHA-3 digest functions (from NIST CSOR)
algorithmNames.put("2.16.840.1.101.3.4.3.5", "DSA");
algorithmNames.put("2.16.840.1.101.3.4.3.6", "DSA");
algorithmNames.put("2.16.840.1.101.3.4.3.7", "DSA");
algorithmNames.put("2.16.840.1.101.3.4.3.8", "DSA");
algorithmNames.put("2.16.840.1.101.3.4.3.9", "ECDSA");
algorithmNames.put("2.16.840.1.101.3.4.3.10", "ECDSA");
algorithmNames.put("2.16.840.1.101.3.4.3.11", "ECDSA");
algorithmNames.put("2.16.840.1.101.3.4.3.12", "ECDSA");
algorithmNames.put("2.16.840.1.101.3.4.3.13", "RSA");
algorithmNames.put("2.16.840.1.101.3.4.3.14", "RSA");
algorithmNames.put("2.16.840.1.101.3.4.3.15", "RSA");
algorithmNames.put("2.16.840.1.101.3.4.3.16", "RSA");
/*
* We tolerate two naming conventions for RSASSA-PSS:
*
* - RSASSA-PSS
* - withRSA/PSS
*
* The former is considered the canonical one because it's the standard name in JCA,
* the digest is required to be specified in the algorithm params anyway,
* and the OID does not depend on the digest. BouncyCastle accepts both.
*/
algorithmNames.put(SecurityIDs.ID_RSASSA_PSS, "RSASSA-PSS");
// EdDSA
algorithmNames.put(SecurityIDs.ID_ED25519, "Ed25519");
algorithmNames.put(SecurityIDs.ID_ED448, "Ed448");
rsaOidsByDigest.put("SHA224", "1.2.840.113549.1.1.14");
rsaOidsByDigest.put("SHA256", "1.2.840.113549.1.1.11");
rsaOidsByDigest.put("SHA384", "1.2.840.113549.1.1.12");
rsaOidsByDigest.put("SHA512", "1.2.840.113549.1.1.13");
rsaOidsByDigest.put("SHA-224", "1.2.840.113549.1.1.14");
rsaOidsByDigest.put("SHA-256", "1.2.840.113549.1.1.11");
rsaOidsByDigest.put("SHA-384", "1.2.840.113549.1.1.12");
rsaOidsByDigest.put("SHA-512", "1.2.840.113549.1.1.13");
rsaOidsByDigest.put("SHA3-224", "2.16.840.1.101.3.4.3.13");
rsaOidsByDigest.put("SHA3-256", "2.16.840.1.101.3.4.3.14");
rsaOidsByDigest.put("SHA3-384", "2.16.840.1.101.3.4.3.15");
rsaOidsByDigest.put("SHA3-512", "2.16.840.1.101.3.4.3.16");
dsaOidsByDigest.put("SHA224", "2.16.840.1.101.3.4.3.1");
dsaOidsByDigest.put("SHA256", "2.16.840.1.101.3.4.3.2");
dsaOidsByDigest.put("SHA384", "2.16.840.1.101.3.4.3.3");
dsaOidsByDigest.put("SHA512", "2.16.840.1.101.3.4.3.4");
dsaOidsByDigest.put("SHA3-224", "2.16.840.1.101.3.4.3.5");
dsaOidsByDigest.put("SHA3-256", "2.16.840.1.101.3.4.3.6");
dsaOidsByDigest.put("SHA3-384", "2.16.840.1.101.3.4.3.7");
dsaOidsByDigest.put("SHA3-512", "2.16.840.1.101.3.4.3.8");
ecdsaOidsByDigest.put("SHA1", "1.2.840.10045.4.1");
ecdsaOidsByDigest.put("SHA224", "1.2.840.10045.4.3.1");
ecdsaOidsByDigest.put("SHA256", "1.2.840.10045.4.3.2");
ecdsaOidsByDigest.put("SHA384", "1.2.840.10045.4.3.3");
ecdsaOidsByDigest.put("SHA512", "1.2.840.10045.4.3.4");
ecdsaOidsByDigest.put("SHA3-224", "2.16.840.1.101.3.4.3.9");
ecdsaOidsByDigest.put("SHA3-256", "2.16.840.1.101.3.4.3.10");
ecdsaOidsByDigest.put("SHA3-384", "2.16.840.1.101.3.4.3.11");
ecdsaOidsByDigest.put("SHA3-512", "2.16.840.1.101.3.4.3.12");
}
/**
* Attempt to look up the most specific OID for a given signature-digest combination.
*
* @param signatureAlgorithmName the name of the signature algorithm
* @param digestAlgorithmName the name of the digest algorithm, if any
* @return an OID string, or {@code null} if none was found.
*/
public static String getSignatureMechanismOid(String signatureAlgorithmName, String digestAlgorithmName) {
String resultingOId;
switch (signatureAlgorithmName) {
case "RSA":
final String oId = rsaOidsByDigest.get(digestAlgorithmName);
resultingOId = oId == null ? SecurityIDs.ID_RSA : oId;
break;
case "DSA":
resultingOId = dsaOidsByDigest.get(digestAlgorithmName);
break;
case "ECDSA":
resultingOId = ecdsaOidsByDigest.get(digestAlgorithmName);
break;
case "Ed25519":
resultingOId = SecurityIDs.ID_ED25519;
break;
case "Ed448":
resultingOId = SecurityIDs.ID_ED448;
break;
case "RSASSA-PSS":
case "RSA/PSS":
resultingOId = SecurityIDs.ID_RSASSA_PSS;
break;
default:
resultingOId = null;
}
if (resultingOId != null) {
return resultingOId;
}
LOGGER.warn(SignLogMessageConstant.ALGORITHM_NOT_FROM_SPEC);
resultingOId = BOUNCY_CASTLE_FACTORY.getAlgorithmOid(digestAlgorithmName + "with" + signatureAlgorithmName);
if (resultingOId == null) {
return BOUNCY_CASTLE_FACTORY.getAlgorithmOid(signatureAlgorithmName);
} else {
return resultingOId;
}
}
/**
* Gets the algorithm name for a certain id.
* @param oid an id (for instance "1.2.840.113549.1.1.1")
* @return an algorithm name (for instance "RSA")
*/
public static String getAlgorithm(String oid) {
String ret = algorithmNames.get(oid);
if (ret == null) {
return oid;
} else {
return ret;
}
}
/**
* Get the signing mechanism name for a certain id and digest.
*
* @param oid an id of an algorithm
* @param digest digest of an algorithm
*
* @return name of the mechanism
*/
public static String getMechanism(String oid, String digest) {
String algorithm = getAlgorithm(oid);
if (!algorithm.equals(oid)) {
return digest + "with" + algorithm;
}
LOGGER.warn(SignLogMessageConstant.ALGORITHM_NOT_FROM_SPEC);
return BOUNCY_CASTLE_FACTORY.getAlgorithmName(oid);
}
}
